My new2me RC hit 224 deg today. Should I be ... - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 23 (permalink) Old 06-12-2013, 10:56 PM Thread Starter
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My new2me RC hit 224 deg today. Should I be ...

concerned?

It was def hot as hell today ... but here's what it was doing:

45 mph on a city road, temp was 208-209 & rose to about 218.

Approaching a traffic light, I was afraid it was gonna go higher ... but the fans apparently dropped it back to 208-ish.

Took off & temp rose again to 220 -> 222.

Stopped at the mechanic I mentioned in my other thread. He said fans usually come on around 218 deg & didn't seem worried about the temps I mentioned ... but he didn't seem worried about much of anything.

20 minutes later on the way home after the mechanic visit, it hit 224 deg. I think that was the tops for the day.

Do I have a problem?? If not, what temp is a problem??


Edit: Damn, there are a zillion "heat" / "temperature" threads ... I've already read a couple, but still curious, a little nervous, but ignore this if you've already answered a bunch of them & can't stand to do another one.

Last edited by extrapolator; 06-12-2013 at 11:01 PM.
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post #2 of 23 (permalink) Old 06-13-2013, 12:44 AM
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You can get front mounts to solve that problem! Readily available and pretty cheap now, and they dont get heat soaked like the side mount ones!
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post #3 of 23 (permalink) Old 06-13-2013, 01:23 AM
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yeah you can get front rads, but thats the first ive heard about them being cheap lol

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post #4 of 23 (permalink) Old 06-13-2013, 01:38 AM
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If 224F is the highest you got, no worries. The SP1 fan doesn't even kick in till 219.

It's not a problem, and front mounts aren't cheap.

Now if you start seeing 230 or above, it's time to be concerned. If you see 251, Shut The Bike Off.

John, 2000 RC51 #000100

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post #5 of 23 (permalink) Old 06-13-2013, 09:25 AM
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It's cheaper than a vasectomy and you will be sterile after roasting your nuts on this RC-51 model

Your temps seem perfectly normal.

And B.T.W. Nice fvkkin bike ;
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post #6 of 23 (permalink) Old 06-13-2013, 09:31 AM Thread Starter
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HAHA! OK, thanks again everybody. Knowing myself I'll prob keep staring at the temp numbers for a while longer & then eventually let it go ... go back to the trip meter so I know when to fill up!

Oh, and ...

Quote:
Originally Posted by jondog9 View Post
If 224F is the highest you got, no worries. The SP1 fan doesn't even kick in till 219.
The mechanic I visited said "about 218", so good to know he was correct.

Quote:
Originally Posted by jondog9 View Post
Now if you start seeing 230 or above, it's time to be concerned. If you see 251, Shut The Bike Off.
Perfect - just what I wanted to know.

Quote:
Originally Posted by wingnutt View Post
Your temps seem perfectly normal.
Also perfect - and just what I wanted to know.

Last edited by extrapolator; 06-13-2013 at 09:35 AM.
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post #7 of 23 (permalink) Old 06-13-2013, 10:16 AM
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I will admit, at my age, I'm not too worried about sterility!
But said RC51 WILL definitely roast said nuts.
Seems it's the frame that radiates that heat to the insides of your thighs. Keeping a full gas tank helps with that.

John, 2000 RC51 #000100

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post #8 of 23 (permalink) Old 06-13-2013, 11:27 AM Thread Starter
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Mechanic asked me if I heard the fans kick on - I had not ... and was worried for a moment before realizing they had to have been on for the temp to drop at the traffic light. After he mentioned the fans, while sitting at a light I could stick my hand down between the gas tank and fairing and feel wind ... which was a comforting confirmation ... still can't hear them, though, although I did have ear plugs in and helmet on.

This helmet, BTW ... came in yesterday Man, Arai makes a very nice helmet! (I'm a nerd I guess when it comes to liking my helmet to match my bike ... meh, what can I say )

I think this helmet, with its more classic racing stripes, kinda goes better with the old skool RC51 than most of the other wild ass graphics on modern helmets.

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post #9 of 23 (permalink) Old 06-13-2013, 11:58 AM
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It's a little strange you cant here your fans. Mine are pretty loud

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post #10 of 23 (permalink) Old 06-13-2013, 12:06 PM
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If you have an SP1, it only has one fan while an SP2 has two fans.
Before you take a ride, reach in through the front, find the fan(s) and give them a good spin.
They should spin freely and coast to a stop.
If they don't spin freely, or stop immediately, or squeak, then it's time to check and possibly replace the fan motors.
It they sound like they're rubbing or making contact with the radiators (frequent occurrence if laid down), then it's time to remove the cowling to determine what is making contact and correct the problem.

Not only were both of my fan motor bearings going bad, but one fan was slightly rubbing the radiator fins.

After replacing the bearings and straightening the fan mounts, my fans on my SP2 come on at 218 deg F (normal) and the temps only reach 221 deg F max in town before quickly dropping to 205-210 as the fans spin.
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